Screws – Go through your R/C and check all of the hardware for being loose and snug them up (R/C screws going into plastic do not need to be tighter then snug). Over time with the vibration of running your R/C the screws will tend to back out and cause issues with flex of items or loosing parts all together. We highly recommend to clean all screws with brake clean and a shop towel to ensure all the threads are clean and anything going into metal use blue thread lock.